APA (7th ed.) Citation

Douglas, I., Huggett, R. J., & Perkins, C. R. (2007). Companion encyclopedia of geography: From local to global (2nd ed.). Routledge.

Chicago Style (17th ed.) Citation

Douglas, Ian, Richard J. Huggett, and C. R. Perkins. Companion Encyclopedia of Geography: From Local to Global. 2nd ed. London: Routledge, 2007.

MLA (9th ed.) Citation

Douglas, Ian, et al. Companion Encyclopedia of Geography: From Local to Global. 2nd ed. Routledge, 2007.